8051 Projects and Tools

Popular Microcontroller Resources

8051 Opcodes

Here you have a table of all 8051 instructions with opcodes, size in bytes, mnemonic and operands.

8051 Instruction Set

Here you have a detailed description of all 8051 instructions.

MCS-51™ Instruction Set Summary

All 8051 instructions on one page.


This web site is dedicated exclusively to the 8052 mirocontroller, related products (both hardware and software), and 8052 derivative chips. This includes the traditional 8052, 8051, 8032, and 8031 along with more modern derivatives such as the Atmel AT89S8252, and many derivatives by Silicon Laboratories, Philips, and many others.

MCS® 51 Microcontroller Family User's Manual

The 8051 is the original member of the MCS® 51 family, and is the core for all MCS 51 devices. Here you can find user's manual in PDF format.

Architecture and Programming of 8051 Microcontrollers

Learn in a quick and easy way to program 8051 microcontroller using many practical examples we have provided for you. Despite its relative old age, 8051 is still the most commonly used microcontroller at present. Beside Intel, many other renowned companies manufacture this model - Philips, Siemens, etc. The book contains details of its architecture and many practical examples, both simple and complex, useful program routines, instructions on handling the programmer for Atmel 51 series, and the guide on using the development systems for Atmel microcontrollers. In the appendices you will find detailed assembler instructions with examples, glossary and much more...

8051 Projects

Rickey's world of Microcontrollers and Microprocessors. Here you will find everything related to microcontrollers, you can download codes, libraries, examples, discuss about your projects and ask doubts in the forum.

Sam's 8051 Page

Here you'll find bits and pieces to help with the 8051 family. There'll be snippets of code, tips, tricks, and circuit details.

Murray R. Van Luyn's home page

Lots of embedded projects, links and downloads (including port of Adam Dunkels' uIP v0.9 TCP/IP stack and webserver to an 8051 microcontroller, Sector-Level Compact Flash Driver Source Code for the 8051 Microcontroller, FAT16 DOS FILESYSTEM Source Code for the 8051 and much more).


ASEM-51 is a two-pass macro assembler for the Intel MCS-51 family of microcontrollers. It is running on the PC under MS-DOS, Windows and Linux. The ASEM-51 assembly language is based on the standard Intel syntax, and implements conditional assembly, macros, and include file processing. The assembler can output object code in Intel-HEX or Intel OMF-51 format as well as a detailed list file. The ASEM-51 package includes support for more than 180 8051 derivatives, a bootstrap program for MCS-51 target boards, and documentation in ASCII and HTML format. And it is free ...

Tutorial Microcontroller

The best tutorial for microcontroller study, teory and application (interface to Keyboard PC, Printer Dot Matrix ADC and more).


Electronic Tutorials, Electronic Project Kits, Robotics Guide for Students, Amateur and Professionals. Computer Architecture and Digital Circuits.

SDCC - Small Device C Compiler

SDCC is a retargettable, optimizing ANSI - C compiler that targets the Intel 8051, Maxim 80DS390, Zilog Z80 and the Motorola 68HC08 based MCUs. Work is in progress on supporting the Microchip PIC16 and PIC18 series. SDCC is Free Open Source Software, distributed under GNU General Public License (GPL). Read more about SDCC - 8051 C compiler.

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